Hand press



July 2, 1935- J. FROMMHERZ HAND PRE S S Filed Nov. 20, 1955 2 Sheets-Sheet l In van/0f J 7 m mmhcr W WW July 2, 1935. J. FROMMHERZ HAND PRESS Filed Nov. 20, 1933 2 Sheets-Sheet 2 Fig.9 1-7 .45 5949' F797 Fig.8 9 ii b 25 iiilllll 7 2 ml l m 7 P.

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IIIIIITI WNW) oooo :9- 48 lnven/or QI 730mm 69 Patented July 2,1935- i I a 2 9,

UNITED STATES PA ENT. ori ce Julius Frommherz, Baden, Germany Application November 20,1933, Scrial'No. 698,889

InGcrmany'July 7, 1982 6 Claims. (01. 153-21) This invention relates to a device with which and also stops 'for' limi g the rocking v r a g ea variety of work can be carried out, more ment. Owing to the construction of the tools particul rl hing stamping, pressing, flangwith .a shank which can be :put through a "bore ing, cutting along straight or curved lines, cutp vided at the end-of the b rotatable 8 ting out teeth and the like, and its main object fastening of the. bar to :the work table can be is to facilitate the manufacture of the individual effected in' a si p manner- I parts required for constructional toys' and for vSuchabar is furthermoreprovided with'auxbuilding models, I iliary devices which enable toothed wheels to be I It has already been proposed, for the purpose P duced. r 1 I of facilitating the manufacture of toy structural The inventionlis illustrated byway of example 10 7 units as required, to assemble tool boxes which in the accompanying drawings, in *which I contain the requisite implements, more partic- Figures 1 and 2 are side and front elevation ularly a small stamping machine and a cutting views 'respectivelyof a punch-like machine; device. Under these circumstances, however, the Figure Bshows:asectiononrthe line Ill-III in various kinds of work required were not carried Figure l; T I

out by one and the same device, and the ap- Figu resMo l2 showonasomewhat larger scale plicability of the individual appliances was very the exchangeable .tools for the various kinds of limited, a separate complete piece of apparatus 'Work, I being needed for almost every variety of work. Eigu-res 4 Ito '7 :being side views @of a die and Theproduction of an implement equally adaptcounter-die for'bending, pressing, and flanging, 2

'ed for effecting the various kinds of work mem- Figures 3 a d 9 being front and :Side w 035 tioned has apparently not hitherto been contem- .ithe dieandcounter-die of a cutting tool, plated, owing to the fact that such a devicewould Figure 10 comprising a front view and an unbe too complicated and too expensive. The dederside'viewof t-hecoun'ter die-anda front view vice according to the present invention,'however, and plan of the .die of a'itool'servingior rolling 25 which is substantially of the nature of a small -or knurling', x I a punch is provided with a number of mutually Figure :11 comprising similar .V-iBW-S of -an'emexchangeable tools co-operatingwith 'oneanbossing tool, and I I other in pairs andserving for punching, stamp- Figure 12 comprising a front J ew of the die I I ing, pressing, bending,drawing, rolling, flanging, and :counter-die of the tooth-cutting tool and a, 30 cutting,'embossing and so forth, of'which all the ,planiof gthedie thereof; punches or counter-dies and all the matrices-or .Figure l3 is aplanview ofa barto'be rotatably dies have preferably cylindrical shanks of the :secured to the work :table; I I same diameter. The exchangeability and also Figures 14 and 15 show in side elevation and the substantially cylindrical shape of the various in planabolts-or studs-adapted to be mounted upon 35 tools, which permits of their being manufactured this bar 'for the purpose of supporting or guiding on turret or automatic lathes, simplify and the work; II cheapen the manufacture. Figure 'ldillustrates in side elevation on the For thevarious operations the hand lever of same scale as Figures land 2 the fitting of the 40 the device is preferably provided with two'dif- -bar,';together with the supporting andguiding 40 ferent cam faces 01' is so constructed as to enable bolts, to the wo-rktable; I I I it to be fitted with a plurality of different ext-Figure 1.7 shows in side elevation and in plan changeable cam guides, so that the ram carry- ,ansauxiliary device for a tooth-cuttingtooLf ing the counter-die tool can execute either a full Figure '18 is a plan view showing the-method working stroke or part of such a strokeof working of thetooth-cutting"tool; and 45 For such devices, to be operated more partic- Figure 19 shows in elevation inthe lefthand ularly by children, a drill gauge of angle iron half and in sectionalelevation in the right hand or the like is known, which has a number of holes half .and also in plan another form'oi construcspaced atequal distances apart, and with which tion of the -auxiliary device for the tooth-cutting the work to be done can be rigidly connected. tool. I I I 50" As compared with this, the present invention Thepunch-like device I is constructedwitha, comprises a bar, which is provided with a row work table '2, having a-ve'rtical'bore 4, in which of holes and is rockable round the tool dies, and the tool matrices or dies are inserted byftheir which carries bolts or stud-s adapted to beset cylindricalshanks, and fastened. by means of a up thereon forsupportingand guiding the work, screw 5. Above this bore the device I is pro- 55 vided, in an overhanging arm, with a guide 6, which is prevented from rotating, and in which slides a ram 1, which carries the counter-die and is held fast by a screw E5. The ram is kept pressed against the work by any convenient spring, not shown, on a hand lever 8. This lever is provided with two different cam faces 9 and ID, by means of which the ram can be caused to execute a complete or partial stroke by rocking the lever down either on one side or on the other. The device is preferably mounted by means of screws H and [2 upon a wooden base I 3, which projects on both sides.

According to Figures 1 and 2 there are inserted in the device I the counter-die l4 and matrix l5 of a punching tool known in itself. In place of the punching tool there may similarly be inserted any of the tools illustrated in Figures 4 to 12.

The counter-die H and the die or matrix l8,v

shown in Figure 4, which serve to bend a right angle outof a strip of sheet aluminium or the like, are provided for. this purpose, like all the other tools that are exchangeable for the stamping tool I 4, 15, with cylindrical shanks I9 and 26.

The counter-die 2i and the die or matrix 22 (Figure 5) form a tool for pressing, for instance for imparting to a strip of sheet metal the form of a channel.

The tool 23, 24 (Fig. 6) serves more particularly for the further treatment of a channel produced with the tools 2|, 22, and renders possible the production of a tube or a shaft.

Byinserting: the counter-die 2! and the matrix 28' (Figure 9), thedevice becomes a pair of shears, with which sheet metal strips or plates can be cut, and even circular discs. When cutting in a straight line a full stroke is imparted to the counter-die 21 by means of the cam face 9, but when cutting along a. curved line a partial stroke is employed, which is obtained by means of the cam face It).

The knurling tool 29, 30 (Figure is adapted for example to roughen a shaft 3!, such as may be manufactured by, means of the tool 23, 24, (Fig. 6), upona part of its length, or to provide it with longitudinal grooves, which is advantageous for the purpose of securing a pulley or a wheel thereto.

' The embossing tool32, 33 (Figure 11) the counter die 32 of which may be provided with a recessed letter and its die-33 with a raised letter, enables small name plates and the like to be embossed out of sheet metal strips, or enables work to-be provided with an inscription, a separate tool being of course required for each letter.

h For almost all the kinds of work described it is advantageous to employ an auxiliary device consisting essentially of a bar 34, shown in Figures 13, 16 and '18. The bar is provided at one end with a circular hole 35, the diameter of which corresponds to that of the shanks 28 of the vari ous dies. Upon introducing the particular die into the bore 4 of the work table, theshank is first passed through thehole 35, whereby the bar 34 becomes oscillatably secured to the work table,

as shown in Figure 16. The bar 34 is provided with a row of holes 36 spaced at equal distances apart, in which fixing bolts 31 (Fig. 14) or guiding bolts 38 (Fig. are inserted by means of pegs 39, the diameter of which preferably corresponds to that of the punching counter-die i 4. By mounting the workpiece 40, for instance a sheet metal strip perforated by means of the punching tool l4, 45, upon the fixing bolt 3?, whichin its turn is insertedin a suitable hole 35 in the bar 34, the distance at which the treatment, for instance the punching of a second hole, is to be effected, is accurately determined. The strip of sheet metal is supported and centered in the guiding bolt 33.

If the treatment of the work is to be effected at a somewhat greater distance than is given by the row of holes in the bar 34, the latter is oscillatably secured ,to the work table by the other end, at which it has a second hole 4 I, the distance of which from the nearest hole 36 is somewhat greater than that of the hole 35. For the purpose of making toothed wheels the distance y of the bore 4! from the last hole 38, serving for cutting round a curve, is preferably equal to the radius of the addendum circle of the smallest toothed wheel to be made, and the distance of the bore 35 from the hole 35 nearest to it (as well as the distance of the holes 36 from one another) is made equal to the radius of the pitch circle of the smallest toothed wheel to be made. By inserting the counter-die 42 and the die 43 (Figure 12) of the tooth-cutting tool it is then possible to produce toothed wheels of which the numbers of teeth are in a simple ratio to one another.

The production of a toothed wheel, as illustrated in Figure 18, is efiected by first providing a piece of sheet metal with a hole 44, which is mounted upon a fixing bolt 3'! on the bar 34. After the sheet metal plate has been cut circular by means of the tool 2?, 23, the latter is exchanged for the tooth-cutting tool 42, 43, and the first tooth gap is cut in the circular disc 53 is obtained. For the purpose of producing the correct tooth pitch there "serves a dividing pawl 45, illustrated in Figure 17, and dimensioned to correspond to the pitch, the neck portion of this dividing pawl being mounted upon the die 43. The projecting tooth 4'! on the dividing pawl is placed in the first gap already cut, and the pawl is swung through an angle,'the Work 53 being drawn into the correct position and placed upon the tool 42, 43. The second tooth gap is thereupon punched out, and the same process is continued until the entire periphery is uniformly toothed. The placing of the tooth 4! of the tooth pawl 45 in the preceding gap is facilitated by connecting the dividing pawl by a tension spring 48 or the like (Figure 18) with a hole in the bar 34.

In place of the dividing pawl 45, an annular body-49 (Fig. 19) may be employed, which is mounted upon the die 43, and to the under side of which is secured a spiral spring 5!], which engages with one end in a notch in the die 43. The spring then serves'to rotate the body 49 and to place the pin 5!, provided on the upper side, in the tooth gap that is already completed.

The bar 34 may furthermore be provided with a stop 52 (Figs. 16 and 18), to be secured on the under side with a screw forinstance, this stop co-operating with one of the three free edges a, b, c of the work table 2, which are at different distances from the bore 4. By swinging the bar 34 round until the stop 52 bears against the appropriate edge of the Work table, and repeatedly cutting one and the same tooth gap, the accurate involute shape of the flanks of the teeth can be produced. The distances of the three edges of the work table from the tool are so selected that accurately shaped teeth for toothed Wheels of three different but definite diameters can be produced.

In connection with the foregoing it is to be particularly observed that the upper surface of the work table is uniformly fiat soas to effectivethrough with but little clearance, so that the ly support the bar at when the latter 'is used and eng a'ged about the circular head of the shank -can oscillate, fixing bolts adapted to be fitted 2 3 of the die whichis engaged in the herein the table. 'Obviously'the bore isadap'tedto receive the shank of anyof the various dies while the cross section of the inner endof each die is cylindrical in-cross section and in each instance forms =a stud-adapted to be engagedbythe-opening 35 inthe'bar 34 when the latter is-used.

"By theaid of the tools and auxiliary 'device "described, and of further tools, notfillustrated, numerous varieties of work can be carried out -with careful accuracy. The applicability of the device is not restricted totheconstructional e lample described and to the possibilities mentioned.

WhatI claim is:

1. A punch-like device comprising a base, a work table thereon having a uniformly flat upper surface and having a vertical bore, an upright arm rising from the base to one side of the work table and terminating in an offset portion disposed over the bore, a guide formed with the offset portion and likewise arranged over the bore, a ram slidabl in the guide, a pair ofmetal working tools removably mounted respectively in the bore and ram, at least one of the pair of tools having a head which is cylindrical in cross section forming a stud adapted toreceive a bar, the bore and ram being adapted to receive metal working tools, the bottom of each of which in 'of the hand lever for cooperating with the ram and by means of which the ram can be caused to execute a complete or partial stroke by rocking the hand lever down on either one side or the other.

2. A punch-like'machine comprising a base, a work table thereon having a vertical bore, an upright arm rising from the base to one side of the work table, a guide supported by the arm and arranged over the bore, a ram slidable in the guide, a pair of metal working tools removablyvmounted respectively in the bore andthe ram, a hand lever mounted above the guide and acting on the ram to move the latter relatively to the platform, theppair of exchangeable tools being adapted for cutting gear teeth, a bar perforated at definite intervals and capable of oscillating about the axis of the shanks of the tools, fixing bolts adapted to be fitted into any one of the perforations in the bar for mounting and guiding the Work to be operated upon by the device, the work table beingcapable of sup porting the perforated bar and having at least three edges at different distances from the axis 7 the guide, a pair of metal Working tools remo'vably mounted respectively in the bore and the ram, a hand lever mounted above the guide and acting on the ram to move the latter relatively to the platform, a bar perforated at definite intervals and having at one end a holelarge enough for the shank of the tool die to pass said shank forms'a pivot-about which-the bar into anyone of the perforations in. the bar for mounting and'guiding the work to be operated "upon bythe device, and the work table being capable of supporting the perforated bar.

4. A punch-like machine comprising a base, a

-work table thereon having a vertical bore, an "upright arm rising from'the base to one side of the worktable, a guide supported by the arm and arranged over the bore, a ram slidablein the 'guide, a pairof metal working tools remova hole large enough for the shank of the tool die to pass through with but little clearance, so that the said shank forms a pivot about which the bar can oscillate, the distance between the centers of the perforations in the bar, and the distance between the center of the end hole and the center of the perforation nearest thereto each.

being equal to the radius of the pitch circle of the smallest toothed wheel to be produced by the machine, fixing bolts adapted to be fitted into any one of the perforations in the bar formounting and guiding the work to be operated upon by the device, the work table being capable of supporting the perforated bar and having at least three edges at different distances from the axis of the tool shanks, and a stop adapted to work table, a guide supported by the arm and 'arranged over the bore, a ram slidable in the guide, a pair of metal working tools removably mounted respectively in the bore and the ram, a hand lever mounted above the guide and acting on the ram to move the latter relatively to the platform, the pair of exchangeable tools being adapted for cutting gear teeth, a bar perforated at definite intervals and having at one end a hole large enough for the shank of the tool. die to pass through with butlittle clearance, so that the said shank forms a pivot about which the bar can oscillate, the distance between the centersof the perforations in the bar, and the distance be tween the center of the end hole and the center of the perforation nearest thereto each being equal to the radius of the pitch circle of the small+ est toothed wheel to be produced by the machine, the other end of the bar being provided with. a second hole, the distance between the center of this second hole and the center of the perforation nearest thereto being equal to the radius of the addendum circle of t -e smallest toothed wheel to be produced by the machine, fixing bolts adapted to be fitted into any one of the perforations in the bar for mounting and guiding the work to be operated upon by the device, and the work table being capable of supporting the perforated bar.

6. A punch-like machine comprising a base, a

work table thereon having a vertical bore, an upright arm rising from the base to one side of the work table, a guide supported by the arm and arranged over the bore, a ram slidable in the guide,

to the platform, the pair ofexchangeable tools" being adapted for cutting gear teeth, a bar perforated at definite intervals and having at one end e5 be fitted into one of the perforations in the bar a pair of metal working tools removably mounted respectively in the bore and the ram, a hand lever mounted above the guide and acting on the rain to move the latter relatively to the platform, the pair of exchangeable tools being adapted for cutting gear teeth, a bar perforated at definite intervals and having at one end a hole large enough for the shank of the-tool die to pass through with but little clearance, so that the said shank forms a pivot about which the bar can oscillate, the distance between the centers of the perforations in the bar, and the distance between the center of the end hole and the center of the Jerforation nearest thereto each being equal to the radius of the pitch circle of the smallest toothed wheel to be produced by the machine, fixing bolts adapted to be fitted into any one of the perforations in the bar for mounting and guiding the work to be operated upon by the device, the work table being capable of supporting the perforated bar and having at least three edges at different distances from the axis of the tool shanks, and a stop adapted to be fitted into one of the perforations in the bar and to co-operate with any one of the edges of the work table so as to limit the oscillation of the bar, a dividing pawl adapted to be mounted for oscillation about the shank axisof the tooth-cutting tools, a projection on the guiding pawl adapted to fit into a tooth space out by the tooth-cutting tool, and tension means secured at one end to the dividing pawl and at the other end to the bar to keep the projection engaged in the tooth space.

JULIUS FROMMHERZ.

CERTIFICATE OF CURRECTEQN. Fatent Ne. 2,@i 6,889. Juiy 2, 1935.

JULIUS FRQMMHERZ.

I t is hereby certified that the residence of the inventer in the above numbered patent was ereneeusiy described and epeeified as "Baden, Germany" Whereas said residence shnnid have been described and specified as Etiiingen, Baden, Germany, as shown by the reeerds of the case in this office; anti that the said Letters Patent should be read with this correction therein timt the same may eonform to the record 0i the case in the Patent Office.

Signed and sealed this 29th day of Oetnber, A. i 1935.

Leslie Frazer (Seal) Acting Cemmissianer of Patents. 

